Please paste the below CSS in “additional CSS” option in “Settings” page.
.wpsr-sb-vl {
width: 100px !important;
}
One suggestion I would say to make your sharbar alignment perfectly is to set the below settings.
select “vertical sharebar position” = stick to content
and “ID or class name of content” = .post box
and click the “open preview and adjust position” button.
Adjust the offset position of the sharebar with respect to the content.
Thanks for using WP Socializer !